Electric motor-driven concrete mixer



Oct. l2, 1948. .1. sANTAGATA 2,450,993

ELECTRIC MOTOR-DRIVEN CONCRETE MIXER Filed April 5, 1945 f 2sheets-sheet 2 l I N if .mx *El u (52N v E NQ i w m J L' La I n i/entorI WWW Patented Oct. 124, 1948 ortica ELE/critic Moron-unweit CONCRETE Ytaxen *Y Joseph Santagata, ranston, It. il. i Application npr'iifs,1945, ,sensi tiesto' zrciaims.l (cresca-177);

` any house current, and then carry on the desired aimssuccessfully.`Assucli, the machine )is :not

only advantageous to the general public, butis especially usefulftofarmers. I ,l v

In addition to the above, a yc'i'fie'ete mixer provided with an electricmotor -propulsion unit-or meansis advantageous in reference to"maintenance or repair work, as the parts ofthe electric drive can bereplaced and repaired with greater expediency and reliability than wouldbe susceptible of accomplishment if an intricate gasoline engine were tobe contended with.

A concrete mixer constructed in accordance with the principles of thisinvention c-an be used profitably by contractors due to low operatingcosts. Being al silent drive, the machine can be operated day or night.On the contrary, gasdriven machines can be operated only during periods,generally in the daytime, when noisy operation is permissible. What ismore important, a machine including an electric drive, there beingnofumes or consumption of fuel, can be operated inside of a building ifnecessary, and, too, this machine can mix more concrete than thegasoline type, this with less horse-power and at more than half thecost. And nally, because of this type of drive, the machine can be builtwith the requisite compactness and a reduction in weight and towed fromplace to place with the least amount of time and effort.

Other features and advantages will become more readily apparent from thefollowing description and the accompanying illustrative drawings:

In the drawings, wherein like numerals are employed to designate likeparts throughout the same- Figure 1 is an end elevational view of a moreor less conventional portable type concrete mixer equipped with anelectric motor-driven structure constructed in accordance with theprinciples of the invention.

2 Figure rvr:i ffisfan end elevation, the gear musing orc've'r 'beingremoved, and the View being taken ysi'iii'ietifhat on 'theplane of theline 2-2 of Figure l 'Figure f3 is a tuev/'looking 'in the oppositedirection, this on the plane of the line :ig-33 of Figure '1. Figurev`41s an exploded "View, that iis, a view showing the individual partswhich go vto make "up "the sprocketwheel and pinion assembly.

figures lisa similar View with the parts of said "assembly 'arranged andYjoined together in opera- 1tiv'e lrel*atin'shiplv Referring4 to the'drawings vby vdistinguishing ire'ference'numerals, it will be seen thatthe usual ltyrieo'f con-crete containing and mixing receptaclefisfdented, this atri. 'Itis mounted for rotation inbeaiings P1 onthefraie structure '8 suppdrted from'the chassis 9, the latter carriedby customary groundengaging 'wheels I0. The customary "crank: means fisprovided at v`I I for dumpingftlie mixer 6.

, I call attention at this time to the pinion and sprocket assemblymeans shown in Figures 4 and 5. Here we see an adapter bracket oriixture I2 bolted to a frame member I3, said fixture being provided withan axle I4 to accommodate the driven rotor unit. This comprises abearing sleeve I5 containing a Timken bearing I6 and having outstandinglugs I'I, the latter being bolted to the marginal portion of the piniongear I8. Parts I5 and I8, of course, surround the shaft I4. There is asimilar and longer sleeve at I9 surrounding the shaft, and this isprovided with outstanding circumferentially spaced lugs 20 secured bythe same bolts to the opposite face or side of the gear I8. Theright-hand end portion of the sleeve forms a hub extension 2| for thesprocket wheel 22, the latter being fitted on the hub and bolted to thedriving lug 23. The aforementioned shaft extends through the bearingunit 24, where it is secured properly in place by nuts, or the like, 25(see Figure 5).

The sprocket wheel 22 is driven by a sprocket chain 26 (see Figure 2),which sprocket chain is connected with a smaller sprocket wheel 21 onthe shaft of the electric motor 28, the latter suitably mounted on thechassis. The large power takeoff gear is indicated -at 29, this beingconnected to the right-hand end ofthe rotating shaft of the mixing drum6.

In actual practice, the gears and sprocket wheels and chain andassociated parts are enclosed in an appropriate gear casing orhousingindicated generally by dotted line 30 in Figure 1.

'This is of any appropriate construction, and is therefore not detailed.

It is thought that persons skilled in the art to Which the inventionrelates Will be able to obtain a clear understanding of the inventionafter considering the description in connection With the drawings.Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in the shape, size and arrangement of details comingwithin the field of invention claimed may be resorted to in actualpractice, if desired.

I claim:

1. A special motion take-oli and transmitting gearing assembly for useon a conventional con'- crete mixer machine for coaction with astandardtype driving gear on the mixer drum and adapted to accommodate astandard sprocket gear equipped electric motor comprising an adapterxture adapted to be secured rigidly to the frame of the mixer machine,and including an outstanding axle, and a rotor including hub meansmounted for rotation on said axle, said hub means including a motiontransmitting gear located for coaction with the driving gearon saidmixer drum, and further including a sprocket wheel arranged for coactionwith a complemental sprocket driven by said motor.

2. In a gear and sprocket adapter assembly f or use on a concrete mixerequipped withjan electric motor, a bracket adapted to be rigidly mountedon a part of the mixer frame, said bracket having an outstanding axle, asleeve mounted on the inner end portion of said axle and abutting thebracket, said sleeve having outstanding lugs, a gear fastened to saidlugs and surrounding the axle, a second somewhat longer sleeve mountedfor rotation on said axle and lhaving lugs ,connected to the oppositeside of said gear, said second sleeve having outstanding lugs andaportion projecting well beyond said lugs and constituting a hub, asprocket wheel mounted on said hub and secured to said outstanding lugs,and means for assembling and maintaining all parts on said axle.

3. In a silent electric drive for a concrete mixer machine Which ischaracterized by a wheel supported chassis and frame, said frame beingadapted to suspend a concrete mixer drum and being provided with usualbearings, said drum being provided With shaft means mounted foroperation in said bearings, the shaft means at one end being providedwith a driven gear, an adapter bracket secured to said frame andincluding an outstanding axle, gearing means ernbodying a hub mountedfor rotation on said axle, said hub embodying a motion transmitting gearaligned with and serving to rotate said driven gear, said hub furtherincluding a sprocket wheel, an electric motor mounted on the chassis andincluding a drive shaft and sprocket Wheel on said drive shaft, saidsprocket wheel being lined up with the rst named sprocket wheel, and asprocket chain trained over said sprocket wheels.

JOSEPH SANTAGATA.

REFERENCES CITED The following references are of record in the Iile ofthis patent:

UNITED STATES PATENTS

